Documentation of deprecated struct. Closing Bug 426.
Documentation of deprecated struct. Closing Bug 426.

madlib/eigen_backup,madlib/eigen_backup,madlib/eigen_backup,rotorliu/eigen,rotorliu/eigen,rotorliu/eigen,rotorliu/eigen,mjbshaw/Eigen,mjbshaw/Eigen,madlib/eigen_backup,mjbshaw/Eigen,mjbshaw/Eigen